drivers/gpu/drm/msm/msm_drv.c

   1 /*
   2  * Copyright (C) 2013 Red Hat
   3  * Author: Rob Clark <robdclark@gmail.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "msm_drv.h"
  19 #include "msm_gpu.h"
  20 #include "msm_kms.h"
  21
  22 static void msm_fb_output_poll_changed(struct drm_device *dev)
  23 {
  24         struct msm_drm_private *priv = dev->dev_private;
  25         if (priv->fbdev)
  26                 drm_fb_helper_hotplug_event(priv->fbdev);
  27 }
  28
  29 static const struct drm_mode_config_funcs mode_config_funcs = {
  30         .fb_create = msm_framebuffer_create,
  31         .output_poll_changed = msm_fb_output_poll_changed,
  32 };
  33
  34 int msm_register_mmu(struct drm_device *dev, struct msm_mmu *mmu)
  35 {
  36         struct msm_drm_private *priv = dev->dev_private;
  37         int idx = priv->num_mmus++;
  38
  39         if (WARN_ON(idx >= ARRAY_SIZE(priv->mmus)))
  40                 return -EINVAL;
  41
  42         priv->mmus[idx] = mmu;
  43
  44         return idx;
  45 }
  46
  47 #ifdef CONFIG_DRM_MSM_REGISTER_LOGGING
  48 static bool reglog = false;
  49 MODULE_PARM_DESC(reglog, "Enable register read/write logging");
  50 module_param(reglog, bool, 0600);
  51 #else
  52 #define reglog 0
  53 #endif
  54
  55 static char *vram;
  56 MODULE_PARM_DESC(vram, "Configure VRAM size (for devices without IOMMU/GPUMMU");
  57 module_param(vram, charp, 0);
  58
  59 void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
  60                 const char *dbgname)
  61 {
  62         struct resource *res;
  63         unsigned long size;
  64         void __iomem *ptr;
  65
  66         if (name)
  67                 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
  68         else
  69                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  70
  71         if (!res) {
  72                 dev_err(&pdev->dev, "failed to get memory resource: %s\n", name);
  73                 return ERR_PTR(-EINVAL);
  74         }
  75
  76         size = resource_size(res);
  77
  78         ptr = devm_ioremap_nocache(&pdev->dev, res->start, size);
  79         if (!ptr) {
  80                 dev_err(&pdev->dev, "failed to ioremap: %s\n", name);
  81                 return ERR_PTR(-ENOMEM);
  82         }
  83
  84         if (reglog)
  85                 printk(KERN_DEBUG "IO:region %s %08x %08lx\n", dbgname, (u32)ptr, size);
  86
  87         return ptr;
  88 }
  89
  90 void msm_writel(u32 data, void __iomem *addr)
  91 {
  92         if (reglog)
  93                 printk(KERN_DEBUG "IO:W %08x %08x\n", (u32)addr, data);
  94         writel(data, addr);
  95 }
  96
  97 u32 msm_readl(const void __iomem *addr)
  98 {
  99         u32 val = readl(addr);
 100         if (reglog)
 101                 printk(KERN_ERR "IO:R %08x %08x\n", (u32)addr, val);
 102         return val;
 103 }
 104
 105 /*
 106  * DRM operations:
 107  */
 108
 109 static int msm_unload(struct drm_device *dev)
 110 {
 111         struct msm_drm_private *priv = dev->dev_private;
 112         struct msm_kms *kms = priv->kms;
 113         struct msm_gpu *gpu = priv->gpu;
 114
 115         drm_kms_helper_poll_fini(dev);
 116         drm_mode_config_cleanup(dev);
 117         drm_vblank_cleanup(dev);
 118
 119         pm_runtime_get_sync(dev->dev);
 120         drm_irq_uninstall(dev);
 121         pm_runtime_put_sync(dev->dev);
 122
 123         flush_workqueue(priv->wq);
 124         destroy_workqueue(priv->wq);
 125
 126         if (kms) {
 127                 pm_runtime_disable(dev->dev);
 128                 kms->funcs->destroy(kms);
 129         }
 130
 131         if (gpu) {
 132                 mutex_lock(&dev->struct_mutex);
 133                 gpu->funcs->pm_suspend(gpu);
 134                 gpu->funcs->destroy(gpu);
 135                 mutex_unlock(&dev->struct_mutex);
 136         }
 137
 138         if (priv->vram.paddr) {
 139                 DEFINE_DMA_ATTRS(attrs);
 140                 dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &attrs);
 141                 drm_mm_takedown(&priv->vram.mm);
 142                 dma_free_attrs(dev->dev, priv->vram.size, NULL,
 143                                 priv->vram.paddr, &attrs);
 144         }
 145
 146         dev->dev_private = NULL;
 147
 148         kfree(priv);
 149
 150         return 0;
 151 }
 152
 153 static int get_mdp_ver(struct platform_device *pdev)
 154 {
 155 #ifdef CONFIG_OF
 156         const static struct of_device_id match_types[] = { {
 157                 .compatible = "qcom,mdss_mdp",
 158                 .data   = (void *)5,
 159         }, {
 160                 /* end node */
 161         } };
 162         struct device *dev = &pdev->dev;
 163         const struct of_device_id *match;
 164         match = of_match_node(match_types, dev->of_node);
 165         if (match)
 166                 return (int)match->data;
 167 #endif
 168         return 4;
 169 }
 170
 171 static int msm_load(struct drm_device *dev, unsigned long flags)
 172 {
 173         struct platform_device *pdev = dev->platformdev;
 174         struct msm_drm_private *priv;
 175         struct msm_kms *kms;
 176         int ret;
 177
 178         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 179         if (!priv) {
 180                 dev_err(dev->dev, "failed to allocate private data\n");
 181                 return -ENOMEM;
 182         }
 183
 184         dev->dev_private = priv;
 185
 186         priv->wq = alloc_ordered_workqueue("msm", 0);
 187         init_waitqueue_head(&priv->fence_event);
 188
 189         INIT_LIST_HEAD(&priv->inactive_list);
 190         INIT_LIST_HEAD(&priv->fence_cbs);
 191
 192         drm_mode_config_init(dev);
 193
 194         /* if we have no IOMMU, then we need to use carveout allocator.
 195          * Grab the entire CMA chunk carved out in early startup in
 196          * mach-msm:
 197          */
 198         if (!iommu_present(&platform_bus_type)) {
 199                 DEFINE_DMA_ATTRS(attrs);
 200                 unsigned long size;
 201                 void *p;
 202
 203                 DBG("using %s VRAM carveout", vram);
 204                 size = memparse(vram, NULL);
 205                 priv->vram.size = size;
 206
 207                 drm_mm_init(&priv->vram.mm, 0, (size >> PAGE_SHIFT) - 1);
 208
 209                 dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &attrs);
 210                 dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);
 211
 212                 /* note that for no-kernel-mapping, the vaddr returned
 213                  * is bogus, but non-null if allocation succeeded:
 214                  */
 215                 p = dma_alloc_attrs(dev->dev, size,
 216                                 &priv->vram.paddr, 0, &attrs);
 217                 if (!p) {
 218                         dev_err(dev->dev, "failed to allocate VRAM\n");
 219                         priv->vram.paddr = 0;
 220                         ret = -ENOMEM;
 221                         goto fail;
 222                 }
 223
 224                 dev_info(dev->dev, "VRAM: %08x->%08x\n",
 225                                 (uint32_t)priv->vram.paddr,
 226                                 (uint32_t)(priv->vram.paddr + size));
 227         }
 228
 229         switch (get_mdp_ver(pdev)) {
 230         case 4:
 231                 kms = mdp4_kms_init(dev);
 232                 break;
 233         case 5:
 234                 kms = mdp5_kms_init(dev);
 235                 break;
 236         default:
 237                 kms = ERR_PTR(-ENODEV);
 238                 break;
 239         }
 240
 241         if (IS_ERR(kms)) {
 242                 /*
 243                  * NOTE: once we have GPU support, having no kms should not
 244                  * be considered fatal.. ideally we would still support gpu
 245                  * and (for example) use dmabuf/prime to share buffers with
 246                  * imx drm driver on iMX5
 247                  */
 248                 dev_err(dev->dev, "failed to load kms\n");
 249                 ret = PTR_ERR(kms);
 250                 goto fail;
 251         }
 252
 253         priv->kms = kms;
 254
 255         if (kms) {
 256                 pm_runtime_enable(dev->dev);
 257                 ret = kms->funcs->hw_init(kms);
 258                 if (ret) {
 259                         dev_err(dev->dev, "kms hw init failed: %d\n", ret);
 260                         goto fail;
 261                 }
 262         }
 263
 264         dev->mode_config.min_width = 0;
 265         dev->mode_config.min_height = 0;
 266         dev->mode_config.max_width = 2048;
 267         dev->mode_config.max_height = 2048;
 268         dev->mode_config.funcs = &mode_config_funcs;
 269
 270         ret = drm_vblank_init(dev, 1);
 271         if (ret < 0) {
 272                 dev_err(dev->dev, "failed to initialize vblank\n");
 273                 goto fail;
 274         }
 275
 276         pm_runtime_get_sync(dev->dev);
 277         ret = drm_irq_install(dev);
 278         pm_runtime_put_sync(dev->dev);
 279         if (ret < 0) {
 280                 dev_err(dev->dev, "failed to install IRQ handler\n");
 281                 goto fail;
 282         }
 283
 284         platform_set_drvdata(pdev, dev);
 285
 286 #ifdef CONFIG_DRM_MSM_FBDEV
 287         priv->fbdev = msm_fbdev_init(dev);
 288 #endif
 289
 290         drm_kms_helper_poll_init(dev);
 291
 292         return 0;
 293
 294 fail:
 295         msm_unload(dev);
 296         return ret;
 297 }
 298
 299 static void load_gpu(struct drm_device *dev)
 300 {
 301         struct msm_drm_private *priv = dev->dev_private;
 302         struct msm_gpu *gpu;
 303
 304         if (priv->gpu)
 305                 return;
 306
 307         mutex_lock(&dev->struct_mutex);
 308         gpu = a3xx_gpu_init(dev);
 309         if (IS_ERR(gpu)) {
 310                 dev_warn(dev->dev, "failed to load a3xx gpu\n");
 311                 gpu = NULL;
 312                 /* not fatal */
 313         }
 314         mutex_unlock(&dev->struct_mutex);
 315
 316         if (gpu) {
 317                 int ret;
 318                 gpu->funcs->pm_resume(gpu);
 319                 ret = gpu->funcs->hw_init(gpu);
 320                 if (ret) {
 321                         dev_err(dev->dev, "gpu hw init failed: %d\n", ret);
 322                         gpu->funcs->destroy(gpu);
 323                         gpu = NULL;
 324                 }
 325         }
 326
 327         priv->gpu = gpu;
 328 }
 329
 330 static int msm_open(struct drm_device *dev, struct drm_file *file)
 331 {
 332         struct msm_file_private *ctx;
 333
 334         /* For now, load gpu on open.. to avoid the requirement of having
 335          * firmware in the initrd.
 336          */
 337         load_gpu(dev);
 338
 339         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 340         if (!ctx)
 341                 return -ENOMEM;
 342
 343         file->driver_priv = ctx;
 344
 345         return 0;
 346 }
 347
 348 static void msm_preclose(struct drm_device *dev, struct drm_file *file)
 349 {
 350         struct msm_drm_private *priv = dev->dev_private;
 351         struct msm_file_private *ctx = file->driver_priv;
 352         struct msm_kms *kms = priv->kms;
 353
 354         if (kms)
 355                 kms->funcs->preclose(kms, file);
 356
 357         mutex_lock(&dev->struct_mutex);
 358         if (ctx == priv->lastctx)
 359                 priv->lastctx = NULL;
 360         mutex_unlock(&dev->struct_mutex);
 361
 362         kfree(ctx);
 363 }
 364
 365 static void msm_lastclose(struct drm_device *dev)
 366 {
 367         struct msm_drm_private *priv = dev->dev_private;
 368         if (priv->fbdev) {
 369                 drm_modeset_lock_all(dev);
 370                 drm_fb_helper_restore_fbdev_mode(priv->fbdev);
 371                 drm_modeset_unlock_all(dev);
 372         }
 373 }
 374
 375 static irqreturn_t msm_irq(int irq, void *arg)
 376 {
 377         struct drm_device *dev = arg;
 378         struct msm_drm_private *priv = dev->dev_private;
 379         struct msm_kms *kms = priv->kms;
 380         BUG_ON(!kms);
 381         return kms->funcs->irq(kms);
 382 }
 383
 384 static void msm_irq_preinstall(struct drm_device *dev)
 385 {
 386         struct msm_drm_private *priv = dev->dev_private;
 387         struct msm_kms *kms = priv->kms;
 388         BUG_ON(!kms);
 389         kms->funcs->irq_preinstall(kms);
 390 }
 391
 392 static int msm_irq_postinstall(struct drm_device *dev)
 393 {
 394         struct msm_drm_private *priv = dev->dev_private;
 395         struct msm_kms *kms = priv->kms;
 396         BUG_ON(!kms);
 397         return kms->funcs->irq_postinstall(kms);
 398 }
 399
 400 static void msm_irq_uninstall(struct drm_device *dev)
 401 {
 402         struct msm_drm_private *priv = dev->dev_private;
 403         struct msm_kms *kms = priv->kms;
 404         BUG_ON(!kms);
 405         kms->funcs->irq_uninstall(kms);
 406 }
 407
 408 static int msm_enable_vblank(struct drm_device *dev, int crtc_id)
 409 {
 410         struct msm_drm_private *priv = dev->dev_private;
 411         struct msm_kms *kms = priv->kms;
 412         if (!kms)
 413                 return -ENXIO;
 414         DBG("dev=%p, crtc=%d", dev, crtc_id);
 415         return kms->funcs->enable_vblank(kms, priv->crtcs[crtc_id]);
 416 }
 417
 418 static void msm_disable_vblank(struct drm_device *dev, int crtc_id)
 419 {
 420         struct msm_drm_private *priv = dev->dev_private;
 421         struct msm_kms *kms = priv->kms;
 422         if (!kms)
 423                 return;
 424         DBG("dev=%p, crtc=%d", dev, crtc_id);
 425         kms->funcs->disable_vblank(kms, priv->crtcs[crtc_id]);
 426 }
 427
 428 /*
 429  * DRM debugfs:
 430  */
 431
 432 #ifdef CONFIG_DEBUG_FS
 433 static int msm_gpu_show(struct drm_device *dev, struct seq_file *m)
 434 {
 435         struct msm_drm_private *priv = dev->dev_private;
 436         struct msm_gpu *gpu = priv->gpu;
 437
 438         if (gpu) {
 439                 seq_printf(m, "%s Status:\n", gpu->name);
 440                 gpu->funcs->show(gpu, m);
 441         }
 442
 443         return 0;
 444 }
 445
 446 static int msm_gem_show(struct drm_device *dev, struct seq_file *m)
 447 {
 448         struct msm_drm_private *priv = dev->dev_private;
 449         struct msm_gpu *gpu = priv->gpu;
 450
 451         if (gpu) {
 452                 seq_printf(m, "Active Objects (%s):\n", gpu->name);
 453                 msm_gem_describe_objects(&gpu->active_list, m);
 454         }
 455
 456         seq_printf(m, "Inactive Objects:\n");
 457         msm_gem_describe_objects(&priv->inactive_list, m);
 458
 459         return 0;
 460 }
 461
 462 static int msm_mm_show(struct drm_device *dev, struct seq_file *m)
 463 {
 464         return drm_mm_dump_table(m, &dev->vma_offset_manager->vm_addr_space_mm);
 465 }
 466
 467 static int msm_fb_show(struct drm_device *dev, struct seq_file *m)
 468 {
 469         struct msm_drm_private *priv = dev->dev_private;
 470         struct drm_framebuffer *fb, *fbdev_fb = NULL;
 471
 472         if (priv->fbdev) {
 473                 seq_printf(m, "fbcon ");
 474                 fbdev_fb = priv->fbdev->fb;
 475                 msm_framebuffer_describe(fbdev_fb, m);
 476         }
 477
 478         mutex_lock(&dev->mode_config.fb_lock);
 479         list_for_each_entry(fb, &dev->mode_config.fb_list, head) {
 480                 if (fb == fbdev_fb)
 481                         continue;
 482
 483                 seq_printf(m, "user ");
 484                 msm_framebuffer_describe(fb, m);
 485         }
 486         mutex_unlock(&dev->mode_config.fb_lock);
 487
 488         return 0;
 489 }
 490
 491 static int show_locked(struct seq_file *m, void *arg)
 492 {
 493         struct drm_info_node *node = (struct drm_info_node *) m->private;
 494         struct drm_device *dev = node->minor->dev;
 495         int (*show)(struct drm_device *dev, struct seq_file *m) =
 496                         node->info_ent->data;
 497         int ret;
 498
 499         ret = mutex_lock_interruptible(&dev->struct_mutex);
 500         if (ret)
 501                 return ret;
 502
 503         ret = show(dev, m);
 504
 505         mutex_unlock(&dev->struct_mutex);
 506
 507         return ret;
 508 }
 509
 510 static struct drm_info_list msm_debugfs_list[] = {
 511                 {"gpu", show_locked, 0, msm_gpu_show},
 512                 {"gem", show_locked, 0, msm_gem_show},
 513                 { "mm", show_locked, 0, msm_mm_show },
 514                 { "fb", show_locked, 0, msm_fb_show },
 515 };
 516
 517 static int msm_debugfs_init(struct drm_minor *minor)
 518 {
 519         struct drm_device *dev = minor->dev;
 520         int ret;
 521
 522         ret = drm_debugfs_create_files(msm_debugfs_list,
 523                         ARRAY_SIZE(msm_debugfs_list),
 524                         minor->debugfs_root, minor);
 525
 526         if (ret) {
 527                 dev_err(dev->dev, "could not install msm_debugfs_list\n");
 528                 return ret;
 529         }
 530
 531         return ret;
 532 }
 533
 534 static void msm_debugfs_cleanup(struct drm_minor *minor)
 535 {
 536         drm_debugfs_remove_files(msm_debugfs_list,
 537                         ARRAY_SIZE(msm_debugfs_list), minor);
 538 }
 539 #endif
 540
 541 /*
 542  * Fences:
 543  */
 544
 545 int msm_wait_fence_interruptable(struct drm_device *dev, uint32_t fence,
 546                 struct timespec *timeout)
 547 {
 548         struct msm_drm_private *priv = dev->dev_private;
 549         int ret;
 550
 551         if (!priv->gpu)
 552                 return 0;
 553
 554         if (fence > priv->gpu->submitted_fence) {
 555                 DRM_ERROR("waiting on invalid fence: %u (of %u)\n",
 556                                 fence, priv->gpu->submitted_fence);
 557                 return -EINVAL;
 558         }
 559
 560         if (!timeout) {
 561                 /* no-wait: */
 562                 ret = fence_completed(dev, fence) ? 0 : -EBUSY;
 563         } else {
 564                 unsigned long timeout_jiffies = timespec_to_jiffies(timeout);
 565                 unsigned long start_jiffies = jiffies;
 566                 unsigned long remaining_jiffies;
 567
 568                 if (time_after(start_jiffies, timeout_jiffies))
 569                         remaining_jiffies = 0;
 570                 else
 571                         remaining_jiffies = timeout_jiffies - start_jiffies;
 572
 573                 ret = wait_event_interruptible_timeout(priv->fence_event,
 574                                 fence_completed(dev, fence),
 575                                 remaining_jiffies);
 576
 577                 if (ret == 0) {
 578                         DBG("timeout waiting for fence: %u (completed: %u)",
 579                                         fence, priv->completed_fence);
 580                         ret = -ETIMEDOUT;
 581                 } else if (ret != -ERESTARTSYS) {
 582                         ret = 0;
 583                 }
 584         }
 585
 586         return ret;
 587 }
 588
 589 /* called from workqueue */
 590 void msm_update_fence(struct drm_device *dev, uint32_t fence)
 591 {
 592         struct msm_drm_private *priv = dev->dev_private;
 593
 594         mutex_lock(&dev->struct_mutex);
 595         priv->completed_fence = max(fence, priv->completed_fence);
 596
 597         while (!list_empty(&priv->fence_cbs)) {
 598                 struct msm_fence_cb *cb;
 599
 600                 cb = list_first_entry(&priv->fence_cbs,
 601                                 struct msm_fence_cb, work.entry);
 602
 603                 if (cb->fence > priv->completed_fence)
 604                         break;
 605
 606                 list_del_init(&cb->work.entry);
 607                 queue_work(priv->wq, &cb->work);
 608         }
 609
 610         mutex_unlock(&dev->struct_mutex);
 611
 612         wake_up_all(&priv->fence_event);
 613 }
 614
 615 void __msm_fence_worker(struct work_struct *work)
 616 {
 617         struct msm_fence_cb *cb = container_of(work, struct msm_fence_cb, work);
 618         cb->func(cb);
 619 }
 620
 621 /*
 622  * DRM ioctls:
 623  */
 624
 625 static int msm_ioctl_get_param(struct drm_device *dev, void *data,
 626                 struct drm_file *file)
 627 {
 628         struct msm_drm_private *priv = dev->dev_private;
 629         struct drm_msm_param *args = data;
 630         struct msm_gpu *gpu;
 631
 632         /* for now, we just have 3d pipe.. eventually this would need to
 633          * be more clever to dispatch to appropriate gpu module:
 634          */
 635         if (args->pipe != MSM_PIPE_3D0)
 636                 return -EINVAL;
 637
 638         gpu = priv->gpu;
 639
 640         if (!gpu)
 641                 return -ENXIO;
 642
 643         return gpu->funcs->get_param(gpu, args->param, &args->value);
 644 }
 645
 646 static int msm_ioctl_gem_new(struct drm_device *dev, void *data,
 647                 struct drm_file *file)
 648 {
 649         struct drm_msm_gem_new *args = data;
 650         return msm_gem_new_handle(dev, file, args->size,
 651                         args->flags, &args->handle);
 652 }
 653
 654 #define TS(t) ((struct timespec){ .tv_sec = (t).tv_sec, .tv_nsec = (t).tv_nsec })
 655
 656 static int msm_ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
 657                 struct drm_file *file)
 658 {
 659         struct drm_msm_gem_cpu_prep *args = data;
 660         struct drm_gem_object *obj;
 661         int ret;
 662
 663         obj = drm_gem_object_lookup(dev, file, args->handle);
 664         if (!obj)
 665                 return -ENOENT;
 666
 667         ret = msm_gem_cpu_prep(obj, args->op, &TS(args->timeout));
 668
 669         drm_gem_object_unreference_unlocked(obj);
 670
 671         return ret;
 672 }
 673
 674 static int msm_ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
 675                 struct drm_file *file)
 676 {
 677         struct drm_msm_gem_cpu_fini *args = data;
 678         struct drm_gem_object *obj;
 679         int ret;
 680
 681         obj = drm_gem_object_lookup(dev, file, args->handle);
 682         if (!obj)
 683                 return -ENOENT;
 684
 685         ret = msm_gem_cpu_fini(obj);
 686
 687         drm_gem_object_unreference_unlocked(obj);
 688
 689         return ret;
 690 }
 691
 692 static int msm_ioctl_gem_info(struct drm_device *dev, void *data,
 693                 struct drm_file *file)
 694 {
 695         struct drm_msm_gem_info *args = data;
 696         struct drm_gem_object *obj;
 697         int ret = 0;
 698
 699         if (args->pad)
 700                 return -EINVAL;
 701
 702         obj = drm_gem_object_lookup(dev, file, args->handle);
 703         if (!obj)
 704                 return -ENOENT;
 705
 706         args->offset = msm_gem_mmap_offset(obj);
 707
 708         drm_gem_object_unreference_unlocked(obj);
 709
 710         return ret;
 711 }
 712
 713 static int msm_ioctl_wait_fence(struct drm_device *dev, void *data,
 714                 struct drm_file *file)
 715 {
 716         struct drm_msm_wait_fence *args = data;
 717         return msm_wait_fence_interruptable(dev, args->fence, &TS(args->timeout));
 718 }
 719
 720 static const struct drm_ioctl_desc msm_ioctls[] = {
 721         DRM_IOCTL_DEF_DRV(MSM_GET_PARAM,    msm_ioctl_get_param,    DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 722         DRM_IOCTL_DEF_DRV(MSM_GEM_NEW,      msm_ioctl_gem_new,      DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 723         DRM_IOCTL_DEF_DRV(MSM_GEM_INFO,     msm_ioctl_gem_info,     DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 724         DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_PREP, msm_ioctl_gem_cpu_prep, DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 725         DRM_IOCTL_DEF_DRV(MSM_GEM_CPU_FINI, msm_ioctl_gem_cpu_fini, DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 726         DRM_IOCTL_DEF_DRV(MSM_GEM_SUBMIT,   msm_ioctl_gem_submit,   DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 727         DRM_IOCTL_DEF_DRV(MSM_WAIT_FENCE,   msm_ioctl_wait_fence,   DRM_UNLOCKED|DRM_AUTH|DRM_RENDER_ALLOW),
 728 };
 729
 730 static const struct vm_operations_struct vm_ops = {
 731         .fault = msm_gem_fault,
 732         .open = drm_gem_vm_open,
 733         .close = drm_gem_vm_close,
 734 };
 735
 736 static const struct file_operations fops = {
 737         .owner              = THIS_MODULE,
 738         .open               = drm_open,
 739         .release            = drm_release,
 740         .unlocked_ioctl     = drm_ioctl,
 741 #ifdef CONFIG_COMPAT
 742         .compat_ioctl       = drm_compat_ioctl,
 743 #endif
 744         .poll               = drm_poll,
 745         .read               = drm_read,
 746         .llseek             = no_llseek,
 747         .mmap               = msm_gem_mmap,
 748 };
 749
 750 static struct drm_driver msm_driver = {
 751         .driver_features    = DRIVER_HAVE_IRQ |
 752                                 DRIVER_GEM |
 753                                 DRIVER_PRIME |
 754                                 DRIVER_RENDER |
 755                                 DRIVER_MODESET,
 756         .load               = msm_load,
 757         .unload             = msm_unload,
 758         .open               = msm_open,
 759         .preclose           = msm_preclose,
 760         .lastclose          = msm_lastclose,
 761         .irq_handler        = msm_irq,
 762         .irq_preinstall     = msm_irq_preinstall,
 763         .irq_postinstall    = msm_irq_postinstall,
 764         .irq_uninstall      = msm_irq_uninstall,
 765         .get_vblank_counter = drm_vblank_count,
 766         .enable_vblank      = msm_enable_vblank,
 767         .disable_vblank     = msm_disable_vblank,
 768         .gem_free_object    = msm_gem_free_object,
 769         .gem_vm_ops         = &vm_ops,
 770         .dumb_create        = msm_gem_dumb_create,
 771         .dumb_map_offset    = msm_gem_dumb_map_offset,
 772         .dumb_destroy       = drm_gem_dumb_destroy,
 773         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 774         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
 775         .gem_prime_export   = drm_gem_prime_export,
 776         .gem_prime_import   = drm_gem_prime_import,
 777         .gem_prime_pin      = msm_gem_prime_pin,
 778         .gem_prime_unpin    = msm_gem_prime_unpin,
 779         .gem_prime_get_sg_table = msm_gem_prime_get_sg_table,
 780         .gem_prime_import_sg_table = msm_gem_prime_import_sg_table,
 781         .gem_prime_vmap     = msm_gem_prime_vmap,
 782         .gem_prime_vunmap   = msm_gem_prime_vunmap,
 783 #ifdef CONFIG_DEBUG_FS
 784         .debugfs_init       = msm_debugfs_init,
 785         .debugfs_cleanup    = msm_debugfs_cleanup,
 786 #endif
 787         .ioctls             = msm_ioctls,
 788         .num_ioctls         = DRM_MSM_NUM_IOCTLS,
 789         .fops               = &fops,
 790         .name               = "msm",
 791         .desc               = "MSM Snapdragon DRM",
 792         .date               = "20130625",
 793         .major              = 1,
 794         .minor              = 0,
 795 };
 796
 797 #ifdef CONFIG_PM_SLEEP
 798 static int msm_pm_suspend(struct device *dev)
 799 {
 800         struct drm_device *ddev = dev_get_drvdata(dev);
 801
 802         drm_kms_helper_poll_disable(ddev);
 803
 804         return 0;
 805 }
 806
 807 static int msm_pm_resume(struct device *dev)
 808 {
 809         struct drm_device *ddev = dev_get_drvdata(dev);
 810
 811         drm_kms_helper_poll_enable(ddev);
 812
 813         return 0;
 814 }
 815 #endif
 816
 817 static const struct dev_pm_ops msm_pm_ops = {
 818         SET_SYSTEM_SLEEP_PM_OPS(msm_pm_suspend, msm_pm_resume)
 819 };
 820
 821 /*
 822  * Platform driver:
 823  */
 824
 825 static int msm_pdev_probe(struct platform_device *pdev)
 826 {
 827         pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
 828         return drm_platform_init(&msm_driver, pdev);
 829 }
 830
 831 static int msm_pdev_remove(struct platform_device *pdev)
 832 {
 833         drm_put_dev(platform_get_drvdata(pdev));
 834
 835         return 0;
 836 }
 837
 838 static const struct platform_device_id msm_id[] = {
 839         { "mdp", 0 },
 840         { }
 841 };
 842
 843 static const struct of_device_id dt_match[] = {
 844         { .compatible = "qcom,mdss_mdp" },
 845         {}
 846 };
 847 MODULE_DEVICE_TABLE(of, dt_match);
 848
 849 static struct platform_driver msm_platform_driver = {
 850         .probe      = msm_pdev_probe,
 851         .remove     = msm_pdev_remove,
 852         .driver     = {
 853                 .owner  = THIS_MODULE,
 854                 .name   = "msm",
 855                 .of_match_table = dt_match,
 856                 .pm     = &msm_pm_ops,
 857         },
 858         .id_table   = msm_id,
 859 };
 860
 861 static int __init msm_drm_register(void)
 862 {
 863         DBG("init");
 864         hdmi_register();
 865         a3xx_register();
 866         return platform_driver_register(&msm_platform_driver);
 867 }
 868
 869 static void __exit msm_drm_unregister(void)
 870 {
 871         DBG("fini");
 872         platform_driver_unregister(&msm_platform_driver);
 873         hdmi_unregister();
 874         a3xx_unregister();
 875 }
 876
 877 module_init(msm_drm_register);
 878 module_exit(msm_drm_unregister);
 879
 880 MODULE_AUTHOR("Rob Clark <robdclark@gmail.com");
 881 MODULE_DESCRIPTION("MSM DRM Driver");
 882 MODULE_LICENSE("GPL");